Saturday, December 21, 2013PITTSBURGH (AP) - Invasive insects have been found in a third landmark Pennsylvania forest, and scientists are considering a possible link to global warming.
The U.S. Forest Service reported this week that the hemlock wooly adelgid has been discovered in the Tionesta forest near the New York border. The tiny pest is often deadly to hemlocks, and the loss of those trees can lead to a cascade of environmental changes for some wildlife, fish, and plants.
This year, officials also announced adelgid infestations at Cook Forest State Park, a National Natural Landmark, and at the Flight 93 National Memorial.
Scientists say they can't conclusively link the adelgid problem to just climate change, but Pennsylvania's official 2013 Climate Impacts Assessment notes that a warming climate may allow the adelgid to expand its range.
Copyright 2013 The Associated Press.